2171478364 has 24 divisors (see below), whose sum is σ = 4151953008. Its totient is φ = 985511040.

The previous prime is 2171478347. The next prime is 2171478383. The reversal of 2171478364 is 4638741712.

It is a self number, because there is not a number n which added to its sum of digits gives 2171478364.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9057 + ... + 66520.

It is an arithmetic number, because the mean of its divisors is an integer number (172998042).

Almost surely, 2^2171478364 is an apocalyptic number.

It is an amenable number.

2171478364 is a deficient number, since it is larger than the sum of its proper divisors (1980474644).

2171478364 is a wasteful number, since it uses less digits than its factorization.

2171478364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76245 (or 76243 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 2171478364 is about 46599.1240690209. The cubic root of 2171478364 is about 1294.9465279074.

The spelling of 2171478364 in words is "two billion, one hundred seventy-one million, four hundred seventy-eight thousand, three hundred sixty-four".